KR102402029B1 - Dish washing machine and method of controlling the same - Google Patents

Abstract

Provided are a dishwasher capable of actively responding to a case in which washing water is not circulated smoothly by sequentially and selectively performing a foam removal operation, a filter clogging removal operation, and a replenishment water operation, and a method for controlling the same.
In addition, the present invention provides a dishwasher and a method for controlling the same, which can reduce the time required to remove the foam by directly spraying washing water on the surface of the foam, rather than simply stopping and waiting for the circulation pump to remove the foam.
A dish washing machine according to an embodiment includes a washing tub; a sump installed under the washing tank and storing washing water; a circulation pump for pumping and circulating the washing water stored in the sump; at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank; a filter for filtering foreign substances contained in the washing water; a detection unit for detecting an abnormality of the circulation pump; And when an abnormality of the circulation pump is detected, one of a bubble removal cycle for removing bubbles generated inside the washing tank, a filter clogging releasing cycle for releasing clogging of the filter, and a make-up water cycle for additionally supplying water to the washing tank It is performed as a first stroke, and if an abnormality of the circulation pump is detected even after the first stroke is completed, one of the remaining two strokes is performed as a secondary stroke, and even after the second stroke is completed, if an abnormality of the circulation pump is detected and a control unit that performs the other one as a tertiary stroke.

Description

DISH WASHING MACHINE AND METHOD OF CONTROLLING THE SAME

When the circulation of washing water is not smoothly performed, the present invention relates to a dishwasher capable of finding a cause and solving a problem, and a method for controlling the same.

A dishwasher includes a main body having a washing tub therein, a basket for accommodating dishes, a sump for storing washing water, a nozzle for spraying washing water, and a circulation pump for supplying the washing water of the sump to the nozzles, It is a home appliance that washes dishes by spraying washing water.

In order for the dishwasher to smoothly perform washing and rinsing processes, washing water above a certain level must be introduced into the circulation pump and circulated. However, if a problem occurs in the process of flowing the washing water into the circulation pump due to various factors such as bubble generation and filter clogging, the circulation amount of the washing water is significantly reduced.

Therefore, when a problem occurs in which the circulation amount of washing water is reduced, it is required to accurately identify the cause and perform an appropriate operation to solve the problem.

Korean Patent Publication No. KR 10-2007-0105043 A

Provided are a dishwasher capable of actively responding to a case in which washing water is not circulated smoothly by sequentially and selectively performing a bubble removal operation, a filter clogging removal operation, and a replenishment water operation, and a method for controlling the same.

In addition, the present invention provides a dishwasher and a method for controlling the same, which can reduce the time required to remove the foam by directly spraying washing water on the surface of the foam, rather than simply stopping and waiting for the circulation pump to remove the foam.

A dish washing machine according to an embodiment includes a washing tub; a sump installed under the washing tank and storing washing water; a circulation pump for pumping and circulating the washing water stored in the sump; at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank; a filter for filtering foreign substances contained in the washing water; a detection unit for detecting an abnormality of the circulation pump; And when an abnormality of the circulation pump is detected, one of a bubble removal cycle for removing bubbles generated inside the washing tank, a filter clogging releasing cycle for releasing clogging of the filter, and a make-up water cycle for additionally supplying water to the washing tank It is performed as a first stroke, and if an abnormality of the circulation pump is detected even after the first stroke is completed, one of the remaining two strokes is performed as a secondary stroke, and even after the second stroke is completed, if an abnormality of the circulation pump is detected and a control unit that performs the other one as a tertiary stroke.

The detection unit may determine that an abnormality has occurred in the circulation pump when a change in power consumption of the circulation pump is detected to be greater than or equal to a preset reference value.

The controller may control the rotation speed of the circulation pump to a first speed to spray the washing water into the foam through the nozzle in order to perform the bubble removal stroke.

The first speed may be less than a speed at which the washing water sprayed from the nozzle reaches the upper basket disposed above the nozzle, and may be greater than or equal to a minimum speed required to rotate the nozzle.

The nozzle is an intermediate nozzle positioned between the upper basket and the lower basket disposed under the washing tub, and the middle nozzle may spray washing water into bubbles positioned at the bottom of the washing tub.

The first speed may be selected in the range of 1400 rpm to 1600 rpm.

The control unit may stop the rotation of the circulation pump in order to perform the bubble removal stroke.

The at least one nozzle may include: an intermediate nozzle positioned between an upper basket disposed on an upper portion of the washing tub and a lower basket disposed on a lower portion of the washing tub; and a lower nozzle positioned below the lower basket.

The controller is configured to slow start the circulation pump when a preset time elapses after stopping the rotation of the circulation pump.

The control unit may control the washing water to be sequentially sprayed through the middle nozzle and the lower nozzle after the circulation pump is slowly started.

It may further include; a water supply valve for controlling the washing water supplied to the inside of the washing tank.

The controller may control the water supply valve to add a predetermined amount of washing water to the washing tank to perform the make-up water stroke.

The controller may supply a predetermined amount of washing water to the washing tub by controlling the water supply valve after draining all the washing water filled in the washing tub to perform the make-up water stroke.

The control unit may perform the bubble removal stroke as the first stroke, perform the filter clogging release stroke as the second stroke, and perform the make-up water stroke as the tertiary stroke.

The control unit, when the abnormality of the circulation pump is detected even after the make-up water stroke is completed, may re-perform the make-up water stroke.

The controller may output an error occurrence warning visually or audibly when the re-performation of the replenishment water according to the abnormal detection of the circulation pump is performed a preset number of times.

A dish washing machine according to another embodiment includes a washing tub; a sump installed under the washing tank and storing washing water; a circulation pump for pumping and circulating the washing water stored in the sump; at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank; a detection unit for detecting an abnormality of the circulation pump; and when an abnormality of the circulation pump is detected, the rotation speed of the circulation pump is controlled at a first speed to spray the washing water into the bubbles, and the first speed is to apply the washing water sprayed from the nozzle to the upper part of the nozzle. It may be less than the speed to reach the disposed upper basket and above the minimum speed required to rotate the nozzle.

The nozzle is an intermediate nozzle positioned between the upper basket and the lower basket disposed under the washing tub, and the middle nozzle may spray washing water into bubbles positioned at the bottom of the washing tub.

The first speed may be selected in the range of 1400 rpm to 1600 rpm.

a washing tank, a sump installed under the washing tank and storing washing water, a circulation pump pumping and circulating the washing water stored in the sump, at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank, and A method of controlling a dishwasher including a filter for filtering foreign substances included in the washing water may include: monitoring whether an abnormality occurs based on a change amount of power consumption of the circulation pump; When an abnormality of the circulation pump is detected, one of a bubble removal cycle for removing bubbles generated inside the washing tub, a filter clogging releasing cycle for releasing clogging of the filter, and a make-up water cycle for additionally supplying water to the washing tub is performed by 1 Carry out as a secondary stroke; If an abnormality of the circulation pump is detected even after the first stroke is completed, one of the remaining two strokes is performed as a second stroke; and performing the other one as a third stroke when an abnormality of the circulation pump is detected even after the second stroke is completed.

Monitoring whether an abnormality occurs based on the change in power consumption of the circulation pump may include determining that an abnormality has occurred in the circulation pump when the change in electric power consumption of the circulation pump is detected to be greater than or equal to a preset reference value.

The bubble removal stroke may include controlling the rotation speed of the circulation pump to a first speed to spray the washing water into the bubbles.

The first speed is less than a speed at which the washing water sprayed from the nozzle reaches an upper basket disposed above the nozzle, and is greater than or equal to a minimum speed required to rotate the nozzle.

The defoaming stroke stops the rotation of the circulation pump; when a preset time elapses after stopping the rotation of the circulation pump, slow start the pump; After slow-starting the circulation pump, the washing water may be sequentially sprayed through an intermediate nozzle disposed in the middle of the washing tank and a lower nozzle disposed below the washing tank.

The make-up water stroke may include adding a predetermined amount of washing water to the washing tank by controlling a water supply valve.

The replenishment water stroke may include supplying a predetermined amount of washing water to the washing tub by controlling a water supply valve after draining all the washing water filled in the washing tub.

performing the defoaming stroke as the first stroke; performing the filter clogging release stroke as the second stroke; The make-up water stroke may be performed as the third stroke.

It may further include; if an abnormality is detected in the circulation pump even after the make-up water stroke is completed, re-performing the make-up water stroke.

It may further include; outputting an error occurrence warning visually or audibly when the re-performing of the replenishment water according to the abnormal detection of the circulation pump is performed a preset number of times.

According to the washing machine and its control method according to an embodiment, when the washing water is not circulated smoothly, it is possible to actively respond by sequentially and selectively performing the foam removal operation, the filter clogging removal operation, and the replenishment water operation.

In addition, it is possible to shorten the time required to remove the foam by directly spraying the washing water on the surface of the foam, rather than simply stopping and waiting for the circulation pump to remove the foam.

1 is a side cross-sectional view illustrating an example of a dishwasher according to an embodiment.
FIG. 2 is a view illustrating a lower portion of the dishwasher according to the example of FIG. 1 .
3 is a diagram illustrating an operation in which a vane reflects washing water in a vane movement section of the dishwasher according to an exemplary embodiment.
4 is a diagram illustrating an operation in which a vane reflects washing water in a non-moving section of the vane of the dishwasher according to an exemplary embodiment.
5 is a diagram illustrating a flow path structure of a dishwasher according to an exemplary embodiment.
6 is a view illustrating a sump, a coarse filter, and a fine filter of the dishwasher according to an exemplary embodiment.
7 is an exploded view illustrating a sump, a coarse filter, a fine filter, and a micro filter of the dishwasher according to an exemplary embodiment.
8 is a cross-sectional view taken along line I-I of FIG. 6 , and FIG. 9 is a plan view illustrating a lower portion of the washing tub of the dishwasher according to an exemplary embodiment.
10 and 11 are control block diagrams of a dishwasher according to an exemplary embodiment.
12 is a diagram illustrating an example of a foam removal process performed by the dishwasher according to an exemplary embodiment.
13A to 13K are diagrams illustrating an example of a filter clogging process performed by the dishwasher according to an exemplary embodiment.
14 is a flowchart illustrating an example of a foam removal process in a method of controlling a dishwasher according to an exemplary embodiment.
15 is a flowchart illustrating another example of a foam removal process in a control method of a dishwasher according to an exemplary embodiment.
16 is a flowchart illustrating another example of a method for resolving an abnormality in a circulation pump in a method for controlling a dishwasher according to an exemplary embodiment.
17A and 17B are flowcharts illustrating an example of a filter clogging process in a control method of a dishwasher according to an exemplary embodiment.
18 is a flowchart of another example of a method for resolving a pump abnormality in a method for controlling a dishwasher according to an embodiment.
19 is a flowchart illustrating an example of outputting an error warning in a method of controlling a dishwasher according to an embodiment.

Hereinafter, an embodiment of a dishwasher and a control method thereof according to an aspect will be described in detail with reference to the accompanying drawings.

First, the structure of the dish washing machine according to an embodiment will be described, and then, the operation of the dish washing machine will be described based on this.

1 is a cross-sectional side view illustrating an example of a dishwasher according to an embodiment, and FIG. 2 is a view illustrating a lower portion of the dishwasher according to the example of FIG. 1 .

1 and 2 , the dishwasher 1 includes a main body 10 forming an exterior, a washing tub 30 provided inside the main body 10, and a washing tub 30 provided inside the washing tub 30 to accommodate dishes. the baskets 12a and 12b, the nozzles 311, 313, 330 and 340 for spraying washing water, the sump 100 for storing the washing water, and the nozzles 311, 313, The circulation pump 51 for supplying the 330 and 340, the drain pump 52 for discharging the washing water from the sump 100 to the outside of the main body 10 together with foreign substances, and the washing water moving inside the washing tank 30 It may include a vane 400 for reflecting the tableware side, and a driving device 420 for driving the vane 400 .

The washing tub 30 has a shape with an open front to accommodate dishes, and has an upper wall 31 , a rear wall 32 , a left wall 33 , a right wall 34 , and a bottom plate 35 . ) is included. The front opening of the washing tank 30 is opened and closed by the door 11 .

The baskets 12a and 12b may be configured as a wire rack made of a wire so that the washing water can pass through without accumulating. The baskets 12a and 12b may be detachably provided inside the washing tank 30 . The baskets 12a and 12b may include an upper basket 12a disposed above the washing tub 30 and a lower basket 12b disposed under the washing tub 30 .

The circulation pump 51 is a universal motor composed of a field coil and an armature, or a brushless direct motor composed of a permanent magnet and an electric magnet; hereinafter, a “BLDC motor” ", etc.) can be used to circulate the washing water.

In this example, a circulation pump 51 using a BLDC motor capable of controlling the rotational speed will be described as an example.

The nozzles 311 , 313 , 330 , and 340 spray washing water at high pressure to wash dishes. The nozzles 311 , 313 , 330 , and 340 are an upper nozzle 311 provided at the upper portion of the washing tub 30 , an intermediate nozzle 313 provided at the center of the washing tub 30 , and a lower portion of the washing tub 30 . The provided lower nozzles 330 and 340 may be included.

The upper nozzle 311 may be provided on the upper side of the upper basket 12a, and may spray the washing water downward while rotating by the water pressure of the sprayed washing water. Accordingly, the upper nozzle 311 may directly spray the washing water toward the dishes stored in the upper basket 12a. To this end, a plurality of spray holes 312 for spraying washing water are provided at the lower end of the upper nozzle 311 .

The intermediate nozzle 313 is provided between the upper basket 12a and the lower basket 12b, and may spray the washing water in the vertical direction while rotating by the water pressure of the sprayed washing water. Accordingly, the intermediate nozzle 313 may directly spray the washing water toward the dishes stored in the upper basket 12a and the lower basket 12b. To this end, a plurality of spray holes 314 for spraying washing water are provided at the upper end and lower end of the intermediate nozzle 313 .

Unlike the upper nozzle 311 and the middle nozzle 313 , the lower nozzles 330 and 340 are provided not to move, and may be fixed to one side of the washing tank 30 . The lower nozzles 330 and 340 are disposed substantially adjacent to the rear wall 32 of the washing tub 30 , and may spray the washing water toward the front of the washing tub 30 . Accordingly, the washing water sprayed from the lower nozzles 330 and 340 may not be directed to the dishes.

The washing water sprayed from the lower nozzles 330 and 340 may be reflected toward the dishes by the vanes 400 . The lower nozzles 330 and 340 are disposed under the lower basket 12b, and the vane 400 reflects the washing water sprayed from the lower nozzles 330 and 340 upward. That is, the washing water sprayed from the lower nozzles 330 and 340 is reflected toward the dishes accommodated in the lower basket 12b by the vane 400 .

The lower nozzles 330 and 340 each have a plurality of spray holes 331 and 341 arranged in the left and right directions of the washing tank 30 . The plurality of spray holes 331 and 341 spray the washing water toward the front.

The vanes 400 may be installed to extend in the left and right directions of the washing tub 30 to reflect all of the washing water sprayed from the plurality of jetting holes 331 and 341 provided in the lower nozzles 330 and 340 . That is, one longitudinal end of the vane 400 is adjacent to the left wall 33 of the washing tub 30 , and the other longitudinal end of the vane 400 is provided adjacent to the right wall 34 of the washing tub 30 . can

These vanes 400 may linearly reciprocate along the spraying direction of the washing water sprayed from the lower nozzles 330 and 340 . That is, the vane 400 moves between a first position positioned close to the door 11 and a second position positioned close to the lower nozzles 330 and 340 , and is sprayed from the lower nozzles 330 and 340 . By changing the injection direction of the washing water, linear reciprocating motion is performed along the front-rear direction of the washing tank 30 .

Here, the second position is a position in which the distance between the vane 400 and the lower nozzles 330 and 340 is minimized. The first position is the position of the vane 400 detected using the time the vane 400 moves from the second position, and the vane 400 approaches the door 11 and the vane 400 and the lower nozzle 330 , 340) is the position that maximizes the distance between them.

Accordingly, the linear type spray structure including the lower nozzles 330 and 340 and the vanes 400 can wash dishes by spraying the washing water over the entire area of the washing tub 30 without blind spots.

The lower nozzles 330 and 340 include a left lower nozzle 330 disposed on the left side of the washing tub 30 and a right lower nozzle 340 disposed on the right side of the washing tub 30 .

The upper nozzle 311 , the middle nozzle 313 , and the lower nozzles 330 and 340 may spray the washing water independently of each other, and the left lower nozzle 330 and the right lower nozzle 340 also independently spray the washing water. can be sprayed

The washing water sprayed from the lower left nozzle 330 is reflected only to the left area of the washing tub 30 by the vane 400 , and the washing water sprayed from the right lower nozzle 340 is the washing tub 30 by the vane 400 . It can be reflected only in the right area of .

Accordingly, the dishwasher 1 can wash the left and right sides of the washing tub 30 independently.

On the other hand, in the above-described example, washing is divided into the left and right sides of the washing tub 30 as an example, but the embodiment of the dishwasher 1 is not limited thereto. is of course

In addition, the above-described structure of the dishwasher 1 is also only an example, and the number and position of the baskets, the number and positions of nozzles, and the structure of the nozzles are not limited to the above-described example, and the dishwashing machine 1 through various design changes is not limited thereto. The structure of the washing machine 1 may be implemented differently from the above-described example.

3 is a view illustrating an operation in which a vane reflects washing water in a vane movement section of the dishwasher according to an embodiment, and FIG. 4 is a view illustrating that the vane reflects washing water in the vane non-moving section of the dishwasher according to an embodiment; It is a drawing showing the operation.

The washing water sprayed from the lower nozzles 330 and 340 may be reflected by the vane 400 toward the dishes. Since the lower nozzles 330 and 340 spray the washing water in an approximately horizontal direction, the lower nozzles 330 and 340 and the vane 400 are located approximately horizontally to each other. Accordingly, the vane 400 cannot move in the area where the lower nozzles 330 and 340 are disposed.

As shown in FIG. 3 , the dishwasher 1 has a vane moving section I1 in which the vanes 400 can move and a vane non-moving section I2 in which the vanes 400 cannot move.

The vane 400 of the dish washing machine 1 according to an embodiment of the present invention may be rotatably provided to wash dishes stored in the vane non-moving section I2.

As shown in FIG. 4 , when the vane 400 rotates toward the vane non-moving section I2 when the vane 400 reaches the vane non-moving section I2 in the vane moving section I1, non-moving It is possible to reflect the washing water toward the dishes in the section I2.

Hereinafter, main components of the dishwasher 1 will be described in turn with reference to the drawings.

First, a stroke, a flow path structure, a structure of a lower nozzle, and a washing water distribution structure of the dishwasher 1 will be described with reference to FIG. 5 together with the above drawings.

5 is a diagram illustrating a flow path structure of a dishwasher according to an exemplary embodiment.

The cycle performed by the dishwasher 1 according to an exemplary embodiment may include a water supply cycle, a washing cycle, a drain cycle, and a drying cycle.

In the water supply stroke, when washing water is supplied into the washing tub 30 through a water supply pipe (not shown), the washing water supplied to the washing tub 30 is supplied to the washing tub 30 by the gradient of the bottom plate 35 of the washing tub 30. It flows to the sump 100 provided at the bottom and is stored in the sump 100 .

In the washing cycle, the circulation pump 51 operates to pump the washing water stored in the sump 100 . The washing water pumped by the circulation pump 51 is distributed to the upper nozzle 311 , the middle nozzle 313 , the left lower nozzle 330 , and the right lower nozzle 340 through the distribution device 200 . Washing water is sprayed at high pressure from the nozzle assembly 300 by the pumping force of the circulation pump 51 to wash dishes.

Here, the upper nozzle 311 and the middle nozzle 313 may receive washing water through the second hose 271b of the distribution device 200 . The lower left nozzle 330 may receive washing water through the first hose 271a of the distribution device 200 . The lower right nozzle 340 may receive washing water through the third hose 271c of the distribution device 200 .

In this example, the distribution device 200 is configured to have a total of four distribution modes.

In the first mode, the distribution device 200 supplies washing water to the upper nozzle 311 and the middle nozzle 313 through the second hose 271b.

In the second mode, the distribution device 200 supplies the washing water to the lower right nozzle 340 through the third hose 271c.

In the third mode, the distribution device 200 supplies washing water to the lower left nozzle 330 and the lower right nozzle 340 through the first hose 271a and the third hose 271c.

In the fourth mode, the distribution device 200 supplies the washing water to the lower left nozzle 330 through the first hose 271a.

On the other hand, of course, the distribution device 200 may be provided to have more various distribution modes, unlike the above-described example.

The washing water sprayed from the nozzles 311 , 313 , 330 , and 340 strikes the dishes, removes foreign substances on the dishes, and falls together with the foreign substances to be stored in the sump 100 again. The circulation pump 51 pumps and circulates the washing water stored in the sump 100 again. During the washing cycle, the circulation pump 51 may repeat operation and stop several times. In this process, foreign substances that have fallen into the sump 100 together with the washing water are collected by the filter installed in the sump 100 and remain in the sump 100 without being circulated to the nozzles 311 , 313 , 330 , and 340 .

In the draining stroke, the drain pump 52 operates to discharge foreign substances and washing water remaining in the sump 100 to the outside of the main body 10 together.

In the drying cycle, a heater (not shown) mounted on the washing tub 30 operates to dry dishes.

6 is a view showing a sump, a coarse filter, and a fine filter of the dishwasher according to an embodiment, and FIG. 7 is an exploded view showing the sump, the coarse filter, the fine filter, and the micro filter of the dishwasher according to an embodiment 8 is a cross-sectional view taken along line I-I of FIG. 6 , and FIG. 9 is a plan view illustrating a lower portion of the washing tub of the dishwasher according to an exemplary embodiment.

6 to 9 , the dishwasher 1 includes filters 120 , 130 , and 140 for filtering foreign substances contained in washing water.

A drain 50 for draining the washing water to the sump 100 is formed in the bottom plate 35 of the washing tub 30, and the bottom plate 35 of the washing tub 30 is directed toward the drain 50 by its own weight. It may have an inclination toward the drain port 50 to be guided.

The sump 100 may have a substantially hemispherical shape with an open top surface. The sump 100 includes a bottom portion 101 , a side wall portion 103 , a water storage chamber 110 formed by the bottom portion 101 and the side wall portion 103 and storing washing water, and a circulation pump 51 . It includes a circulation port 107 to which is connected, and a drain port 108 to which a drain pump 52 is connected.

The filters 120 , 130 , and 140 include a fine filter 120 mounted on the drain 50 of the bottom plate 35 , a coarse filter 140 mounted on the sump 100 , and a micro filter (130, micro filter) may be included.

The coarse filter 140 may have a substantially cylindrical shape. In addition, the coarse filter 140 is mounted on the inner side of the side wall portion 103 of the sump 100 to filter out foreign substances having a relatively large size.

Also, the coarse filter 140 passes through the passage hole 139 of the micro filter 130 and the passage hole 122 of the fine filter 120 and is mounted on the sump 100 . The upper portion of the coarse filter 140 protrudes into the washing tub 30 and the lower portion protrudes into the foreign material collecting chamber 111 of the sump 100 .

The fine filter 120 may have a filter unit 121 that filters out foreign substances having a relatively medium size or larger, and a through hole 122 through which the coarse filter 140 passes. The fine filter 120 may be mounted approximately horizontally on the drain hole 50 of the bottom plate 35 of the washing tub 30 . The fine filter 120 may have an inclination such that the washing water is guided toward the passage hole 122 by its own weight.

The washing water of the washing tank 30 may flow toward the coarse filter 140 along the slope of the fine filter 120 . However, some washing water and foreign substances may pass through the filter unit 121 of the fine filter 120 and directly flow into the water storage chamber 110 of the sump 100 .

The micro filter 130 includes a filter unit 131 having a flat shape and filtering foreign substances of a relatively small size, frames 132 , 133 , 135 supporting the filter unit 131 , and a coarse filter 140 . It may have a through hole 139 through which it passes.

The frames 132 , 133 , and 135 include an upper frame 132 , a lower frame 133 , and side frames 135 . The micro filter 130 is formed in the sump 100 so that the lower frame 133 is in close contact with the bottom 101 of the sump 100 and the side frames 135 are in close contact with the side wall 103 of the sump 100 . is mounted on

The micro filter 130 may divide the water storage chamber 110 of the sump 100 into a foreign material collection chamber 111 and a circulation chamber 112 . A drain pump 52 is connected to the foreign material collection chamber 111 , and a circulation pump 51 is connected to the circulation chamber 112 .

As described above, since the lower portion of the coarse filter 140 is provided to protrude into the foreign material collecting chamber 110 , the washing water passing through the coarse filter 140 and foreign substances contained in the washing water flows into the foreign material collecting chamber 110 . do.

The washing water introduced into the foreign material collecting chamber 111 may pass through the micro filter 130 and flow into the circulation chamber 112 . However, foreign substances contained in the washing water introduced into the foreign material collecting chamber 111 do not pass through the micro filter 130 , so they cannot flow into the circulation chamber 112 and remain in the foreign material collecting chamber 111 as it is.

The foreign substances collected in the foreign material collecting chamber 110 may be discharged to the outside of the main body 10 together with the washing water when the drain pump 52 is driven.

On the other hand, to prevent foreign substances from the foreign material collecting chamber 110 from flowing into the circulation chamber 112 through the gap between the micro filter 130 and the sump 100, the micro filter 130 is disposed at the bottom of the sump 100 ( 101) and the side wall portion 103 should be in close contact.

To this end, a lower sealing groove 134 may be formed in the lower frame 133 of the micro filter 130 , and a side sealing protrusion 136 may be formed in the side frame 135 . Correspondingly, a lower sealing protrusion 102 inserted into the lower sealing groove 134 is formed on the bottom 101 of the sump 100 , and a side sealing protrusion 136 is formed on the side wall 103 of the sump 100 . ) A side sealing groove 104 into which is inserted may be formed.

The sealing of the micro filter 130 and the sump 100 can be strengthened by the downward and lateral protrusion and groove structures.

Meanwhile, the coarse filter 140 may be vertically inserted into the sump 100 and then rotated from the unlocked position to the locked position to be mounted on the sump 100 .

The coarse filter 140 may be disposed to be biased toward one of the sidewalls 33 and 34 of the washing tub 30 . That is, the coarse filter 140 may be disposed closer to the left wall 33 than to the right wall 34 . Through the arrangement of the coarse filter 140 , the coarse filter 140 can be easily separated without interfering with the rail 440 when the coarse filter 140 is separated.

Hereinafter, the operation of the dish washing machine 1 will be described in detail based on the structure of the dish washing machine 1 described above.

10 and 11 are control block diagrams of a dishwasher according to an exemplary embodiment.

Referring to FIG. 10 , the dishwasher 1 may include an input unit 710 , a control unit 720 , a memory 730 , a driving unit 740 , a display unit 750 , and a detection unit 760 .

The input unit 710 may receive a command for executing a water supply stroke, a washing stroke, a drainage stroke, and a drying stroke of the dishwasher 1 by a user's manipulation.

Also, the input unit 710 may receive a command for operation information such as a washing course, washing water temperature, and rinsing addition from a user.

The washing course consists of a water supply cycle that supplies washing water, a washing cycle that sprays washing water onto the dishes after water supply, and a heating cycle that heats the washing water to an appropriate temperature for washing and rinsing before spraying it on the tableware, and discharges the washing water to the outside after washing. It may include a standard course that sequentially operates the processes of the draining cycle and drying cycle of drying the washed dishes after washing, and a manual course in which the user arbitrarily selects and operates each cycle according to the situation.

The input unit 710 may input a command by a user's pressure or touch, or may include a jog shuttle that pushes or rotates up, down, left, or right directions.

The display unit 750 may display a screen for indicating the operating state of the dishwasher 1 or a screen for guiding a user's input.

The display unit 750 may include a display panel such as an LED panel, an LCD panel, or an OLED panel.

The controller 720 may control overall operations of the dishwasher 1, such as a water supply stroke, a washing stroke, a drainage stroke, and a drying stroke, according to a command input through the input unit 710 . That is, the controller 720 may generate a control signal for controlling the water supply valve 49 , the circulation pulp 51 , the drain pump 52 , the distribution device 200 , and the like to perform each stroke.

The controller 720 may include a processor that executes a program for performing the operation of the dishwasher 1 . A single processor may be included, or a plurality of processors may be included according to the operation of the dishwasher 1 .

The memory 730 includes a program for performing the operation of the dish washing machine 1 , control data for controlling the operation of the dish washing machine 1 , reference data used during operation control of the dish washing machine 1 , and the dish washing machine 1 . ), operation data generated while performing a predetermined operation, setting information such as setting data input by the input unit 710 to cause the dishwasher 1 to perform a predetermined operation, and setting information such as the dishwasher 1 to perform a predetermined operation Usage information including the number of times performed, model information of the dishwasher 1 , and failure information including a cause or location of a malfunction when the dishwasher 1 malfunctions may be stored.

The memory 730 is created in the process of controlling the operation of the dishwasher 1 as well as non-volatile memories (not shown) such as a magnetic disk and a solid state disk that permanently store data. It may include a volatile memory (not shown) such as D-RAM or S-RAM for temporarily storing data to be used.

The water supply valve 49 controls the water supply of water (washing water) supplied into the washing tank 30 through a water supply pipe (not shown) in the water supply stroke. For example, when the water supply valve 49 is opened, washing water is supplied into the washing tank 30 through the water supply pipe, and when the water supply valve 49 is closed, the supply of washing water is stopped.

Descriptions of the circulation pump 51 , the drain pump 52 , the distribution device 200 , and the vane 400 are the same as described above.

The driving unit 740 includes a water supply valve 49 , a circulation pump 51 , a drain pump 52 , a distribution device 200 , and a vane 400 related to the operation of the dishwasher 1 according to a control signal from the control unit 720 . ), etc. To this end, the drive unit 740 may include at least one motor that generates power to provide the water supply valve 49 , the circulation pump 51 , the drain pump 52 , the distribution device 200 and the vane 400 . and may further include a structure such as a gear for transmitting the generated power as necessary.

In addition, a plurality of motors respectively corresponding to the water supply valve 49 , the circulation pump 51 , the drain pump 52 , the distribution device 200 and the vane 400 may be provided, and the plurality of motors include the water supply valve ( 49 ), the circulation pump 51 , the drain pump 52 , the distribution device 200 and the vane 400 .

For example, a motor for providing power to the vane 400 may be disposed under the bottom plate cover 600 , and the above-described driving device 420 of the vane 400 may also be included in the driving unit 740 .

The detection unit 760 detects information related to the state of the dishwasher 1 and transmits it to the control unit 720 . The control unit 720 may perform an operation corresponding thereto based on the information received from the detection unit 760 .

According to the example of FIG. 11 , the detection unit 760 includes a flow meter 761 for detecting the flow rate of the washing water supplied to the washing tank 30 , a vane position detection unit 763 for detecting the position of the vane 400 , and the circulation pump 51 . ) may include a pump abnormality detection unit 765 for detecting an abnormality.

In addition, the dishwasher 1 may further include a timer 770 , and the controller 720 controls the water supply valve 49 , the circulation pump 51 , and the drain pump 52 , that is, the driving unit ( By counting the time required for the 740 to drive the water supply valve 49 , the circulation pump 51 , and the drain pump 52 , the amount of water supplied, the amount of drainage, the amount of washing water sprayed, etc. may be determined.

The vane position detection unit 763 may include a permanent magnet installed on the lower surface of the vane and a magnetic sensor installed at a position corresponding to the permanent magnet to detect a magnetic field of the permanent magnet.

The permanent magnet is a position identification member that moves together with the vane 400 to generate a magnetic field, and the magnetic sensor is installed on the bottom plate cover 600 to detect the magnetic field generated by the permanent magnet.

A position at which the magnetic sensor detects the magnetic field of the permanent magnet during the movement path of the vane 400 may be a reference position, and the reference position may be the above-described second position.

The position detection unit 763 does not necessarily have to be implemented with a permanent magnet and a magnetic sensor, and a protrusion and a micro switch, a permanent magnet and a reed switch, an infrared sensor module, a capacitive proximity sensor, and an ultrasonic sensor module It is also possible to be implemented as

The reference position may be a reference point of movement of the vane 400 . Specifically, the dishwasher 1 may calculate the position of the vane 400 by moving the vane 400 based on the reference position. For example, when it is desired to position the vane 400 at a specific position, the dishwasher 1 may move the vane 400 to a desired position by moving the vane 400 based on the reference position.

When the washing or draining cycle of the dishwasher 1 starts or ends, the dishwasher 1 positions the vane 400 at the reference position. That is, the reference position may be a position at which the vane 400 starts moving and a position at which the vane 400 ends the movement.

For example, the controller 720 may move the vane 400 to the initial position before the draining stroke. That is, a control signal for moving the vane 400 to the initial position may be transmitted to the driving unit 740 .

In addition, the control unit 720 strongly sprays the washing water in a state in which the vane 400 is moved to the initial position before the draining cycle to remove foreign substances remaining on the bottom of the washing tub 30, in particular, the fine filter 120. 51) can control the rotation speed (RPM). That is, a control signal for controlling the rotation speed of the circulation pump 51 may be transmitted to the driving unit 740 .

In addition, the control unit 720 counts the driving time of the circulation pump 51 for removing the foreign substances remaining in the fine filter 120 in the timer 770 and counts the reference time (to remove the foreign substances remaining on the bottom of the washing tub) The time for spraying the washing water; within about 3 seconds), it is possible to control the circulation pump 51 to be driven.

To this end, when the control unit 720 reaches a position that minimizes the distance between the vane 400 and the nozzle assembly 300 when the vane 400 moves and approaches the bottom plate cover 600, that is, the reference position is reached, the vane ( 400) is stopped, and the circulation pump 51 is driven at a constant speed (about 2600 RPM) for a reference time (within about 3 seconds) so that the washing water reflected by the vane 400 is the rear wall of the washing tank 30 . (32) to be able to hit (see Figure 4).

The washing water hitting the rear wall 32 of the washing tub 30 forms a fast and strong current along the bottom plate 35 of the washing tub 30, and the fast and strong current is a fine filter mounted on the bottom of the washing tub 30 ( It is possible to remove foreign substances remaining in the fine filter 120 by flowing to 120 .

On the other hand, without installing a separate vane position detection unit 763 to detect the reference position of the vane 400, the motor 530 is driven to move the vane 400 to the rearmost of the rail assembly 430, When the magnitude of the detected driving current is greater than or equal to a predetermined reference current by detecting the driving current supplied to the driving motor 530 while driving the motor 530 , the vane 400 moves toward the rearmost (reference position) of the rail assembly 430 . ), it is also possible to judge that it is located in

As described above, the washing water stored in the sump 100 must normally flow into the circulation pump 51 to smoothly perform the washing cycle and the rinsing cycle. Accordingly, when the washing water does not normally flow into the circulation pump 51 , that is, when a pump abnormality is detected, the control unit 720 may perform an appropriate operation to solve the abnormality.

To this end, the pump abnormality detection unit 765 detects whether the washing water is normally introduced into the circulation pump 51 , and various methods for this purpose may be employed.

When the circulation amount of the washing water circulated by the circulation pump 51 is reduced, the power consumption of the circulation pump 51 is reduced. Accordingly, the pump abnormality detection unit 765 may monitor the power consumption of the circulation pump 51 , detect a change in power consumption, in particular, a decrease in power consumption, and transmit it to the control unit 720 .

As a specific example, the pump abnormality detection unit 765 may monitor the current applied to the circulation pump 51 , and when the change in the current becomes greater than or equal to a preset reference value, the pump abnormality detection signal may be transmitted to the control unit 720 .

When the circulating amount of the washing water circulated by the circulation pump 51 is reduced, the injection pressure is reduced, so washing performance may be deteriorated, and abnormal noise may be generated due to cavitation.

Accordingly, in the dish washing machine 1 according to an exemplary embodiment, when a pump abnormality is detected, the controller 720 performs an operation to solve the pump abnormality problem. In order to solve the problem of pump abnormality, it is necessary to identify the cause and perform an operation to solve the cause.

During the washing process, bubbles may be generated when the washing water is sprayed due to external factors such as foreign substances, detergent, and washing water. In particular, if there is an egg shell, a lot of foam is generated. If bubbles are generated during the washing cycle, a problem occurs in the process in which the washing water is introduced into the circulation pump 51 , so that the circulation amount of the washing water is significantly reduced, and the power consumption of the circulation pump 51 is reduced. Accordingly, the bubbles generated in the washing tank 30 may be a cause of obstructing the circulation of the washing water in the sump 100 , that is, a cause of abnormality of the circulation pump 51 .

In addition, even when the filters 120 , 130 , and 140 are clogged by foreign substances, the washing water cannot smoothly flow into the circulation pump 51 and the circulation of the washing water is disturbed.

In addition, even when the supply water itself is insufficient, washing water cannot be circulated normally.

Accordingly, when an abnormality of the circulation pump 51 is detected, the control unit 720 may facilitate the circulation of the washing water by sequentially or selectively performing the bubble removal stroke, the filter clogging release stroke, and the replenishment water stroke.

Specifically, when an abnormality of the circulation pump 51 is detected, one of a bubble removal stroke, a filter clogging release stroke, and a make-up water stroke is performed as a primary stroke, and even after the primary stroke is completed, the abnormality of the circulation pump 51 is detected. If detected, one of the remaining two strokes may be performed as a secondary stroke. In addition, if an abnormality of the circulation pump 51 is detected even after the second stroke is completed, the remaining one stroke may be performed as the third stroke.

If two or more of the three strokes are performed, there is no restriction on the order of execution. That is, there is no limitation on which of the bubble removal stroke, the filter clogging stroke and the make-up water stroke is performed as the 1st stroke, the 2nd stroke, and the 3rd stroke, but in the embodiment to be described below, the bubble removal stroke and filter clogging Let's take an example of performing the release stroke and the replenishment water stroke in the order.

12 is a diagram illustrating an example of a foam removal process performed by the dishwasher according to an exemplary embodiment.

When a decrease in power consumption of the circulation pump 51 is detected, the control unit 720 stops the operation being performed at the time when the decrease in power consumption is detected. The interrupted cycle may correspond to a cycle requiring the circulation of washing water, that is, a washing cycle or a rinsing cycle.

After stopping the operation being performed, the control unit 720 may remove the bubbles (B) by directly spraying washing water to the generated bubbles (B) as shown in FIG. 12 .

In this case, the controller 720 may control the distribution device 200 to spray the washing water through at least one of the upper nozzle 311 , the middle nozzle 313 , and the lower nozzles 330 and 340 . For example, as shown in FIG. 12 , when washing water is sprayed through the intermediate nozzle 313 , the sprayed washing water can directly hit the bubbles B while falling toward the bottom plate 35 , and By the bubble (B) can be removed.

In addition, the controller 720 may control the rotational speed of the circulation pump 51 to adjust the flow rate supplied to the nozzle. As an example, the rotation speed of the circulation pump 51 is controlled to a level lower than the speed (eg, 3000 to 3400 rpm) applied during the washing cycle or the rinsing cycle from the intermediate nozzle 313 as shown in FIG. 12 . The washing water W sprayed toward the upper portion of the washing tank 30 may rise only to the reference height h and then fall.

Here, the reference height h means the maximum elevation height of the washing water W sprayed from the intermediate nozzle 313 , and may be a level that does not collide with the lower end of the upper basket 12a. By allowing the washing water W sprayed from the intermediate nozzle 313 to fall before reaching the lower end of the upper basket 12a, the sprayed washing water collides with the lower end of the upper basket 12a or dishes, thereby preventing a phenomenon in which bubbles increase. can be prevented

Meanwhile, the rotation speed of the circulation pump 51 may be controlled as a first speed, the first speed being less than the speed at which the washing water sprayed from the intermediate nozzle 313 reaches the upper basket 12a, and the intermediate nozzle 313 can be set above the minimum speed required to rotate it. When the intermediate nozzle 313 is rotated by the water pressure of the sprayed washing water, the area of bubbles removed by the washing water may be expanded compared to a case in which the intermediate nozzle 313 does not rotate.

The first speed may be preset by an experiment or simulation, and the set value may vary according to design matters of the dishwasher 1 . As an experimental example, when the washing water is supplied to the intermediate nozzle 313 by operating the circulation pump 51 at a speed of 1200 rpm, the intermediate nozzle 313 does not rotate and the sprayed washing water is located at the lower end of the upper basket 12a. did not reach In this case, it took 27 seconds to remove the foam, and the required time was reduced by 46% compared to the case where the circulation pump 51 was stopped.

In addition, when the circulation pump 51 was operated at a speed of 1400 rpm to supply washing water to the intermediate nozzle 313, the intermediate nozzle 313 rotated and the sprayed washing water did not reach the lower end of the upper basket 12a. . In this case, it took 18 seconds to remove the foam, and the required time was reduced by 64% compared to the case where the circulation pump 51 was stopped.

In addition, when the circulation pump 51 was operated at a speed of 1600 rpm to supply washing water to the intermediate nozzle 313, the intermediate nozzle 313 rotated and the sprayed washing water did not reach the lower end of the upper basket 12a. . In this case, it took 15 seconds to remove the foam, and the required time was reduced by 70% compared to the case where the circulation pump 51 was stopped.

On the other hand, the control unit 720 may perform the bubble removal process for the first time. That is, the rotation speed of the circulation pump 51 may be controlled at the first speed for the first time period. As in the above-described experimental example, the time required to remove the bubbles also varies depending on the rotational speed of the circulation pump 51, and the first time may be appropriately set according to the first speed.

When a first time elapses after the circulation pump 51 is operated at the first speed, the controller 720 may slow start the circulation pump 51 at the second speed. For example, if the circulation pump 51 is driven slowly at a speed of about 1600 rpm to 3000 rpm, it is possible to prevent the bubbles remaining on the floor that are not removed by the blow of the washing water from rapidly rising.

A slow start of the circulation pump 51 may be performed for the second time period, and the second time period may be set to about 1 minute.

When the second time elapses after the slow start of the circulation pump 51 has elapsed, the control unit 720 drives the circulation pump 51 at the third speed for a third time to close the upper nozzle 311 and the intermediate nozzle 313 . Washing water can be sprayed through. Here, the third speed may be set in consideration of the water pressure required to wash the foam remaining at the bottom of the washing tub 30, and the third time may be set to an appropriate time required to wash the bubbles at the bottom of the washing tub 30. . For example, the third speed may be set in the range of about 3000 rpm to 3400 rpm, and the third time may be set to about 1 minute.

Also, after spraying the washing water through the upper nozzle 311 and the middle nozzle 313 , the controller 720 may control the distribution device 200 so that the washing water is sprayed through the lower nozzles 330 and 340 . At this time, the rotation speed of the circulation pump 51 can be controlled as the fourth speed and the injection time as the fourth time, the fourth speed and the fourth time are the third speed and the third time in the washing tank 30 It may be set identically or may be set differently.

On the other hand, in the above example, the washing water is sprayed through the upper and middle nozzles 311 and 313 and then the washing water is sprayed through the lower nozzles 330 and 340 sequentially to remove the bubbles inside the washing tank 30 . Although washing has been described as an example, the embodiment of the dishwasher 1 is not limited thereto, and after the third time has elapsed, the circulation pump 51 is re-driven and the washing water is sprayed through the rotary nozzles 311 and 313. It may be configured to wash the bubbles inside the washing tank 30 .

In addition, it may be configured to spray the washing water through the lower nozzles 330 and 340 while re-driving the circulation pump 51 after the slow start to wash the bubbles inside the washing tank 30 .

In addition, the re-driving of the circulation pump 51 and the washing water jetting operation through the upper and intermediate nozzles 311 and 313 and the washing water jetting operation through the fixed nozzles 330 and 340 may be sequentially performed, and each Of course, the operation may be configured to proceed alone or in conjunction with each other in parallel.

In addition, as another example, it is also possible to wait until the foam sinks to the bottom of the washing tank 30 without driving the circulation pump 51 at the start of the foam removal cycle. In this case, the operation of slow-starting the circulation pump 51 by driving the circulation pump 51 at the second speed for the second time is the same as in the above-described example.

In addition, it is also possible to immediately end the bubble removal stroke without performing a slow start after driving the circulation pump 51 at the first speed for the first time.

When the change in power consumption of the circulation pump 51 falls below the reference value after the bubble removal cycle is finished, the control unit 720 sees that the washing water is circulated normally by removing the bubbles, and was performed before the start of the bubble removal cycle. The previous administration may be resumed.

During the washing cycle of the pre-washing and main washing of the dishwasher (1), a lot of foreign substances on the dishes are separated from the dishes by the washing water sprayed, and toward the filters (120, 130, 140) on the bottom of the dishwasher (1). The gathering process is repeated to proceed with the washing process.

At this time, when an amount of foreign matter greater than the amount that can be filtered and washed by the filters 120 , 130 , 140 is separated from the dishes, the filters 120 , 130 , 140 may be temporarily clogged.

Accordingly, the amount of water stored in the sump 100 is reduced because the washing water does not pass smoothly through the filters 120, 130, and 140, and the circulating amount of the washing water circulated for washing dishes is reduced, so that normal washing is not performed. can't

Therefore, the control unit 720 determines that the filter clogging is included in the cause of the change in power consumption when the amount of change in power consumption is still greater than or equal to the reference value even after the bubble removal process is completed, and starts the filter clogging release process .

The filter clogging release algorithm detects clogging of the filters 120, 130, 140 regardless of the washing process such as preliminary washing or main washing, using a small amount of water (about 700 ~ 900cc) to remove the filter 120, 130, 140) to remove the foreign matter blocking it.

After supplying a small amount of water (about 700 to 900 cc), the circulation pump 51 is driven at a fifth speed (about, 1200 to 1400 RPM) so that the washing water flows strongly along the bottom plate 35 of the washing tank 30 . And, it is possible to release the blockage of the filters (120, 130, 140) by the current flowing along the bottom plate (35).

700 ~ 900cc is a small amount of washing water that can fill the inside of the sump 100, and during the filter clogging process, less than 1/4 of the amount of water supplied during the general washing or rinsing process. For example, the amount of washing water required for the washing process may be the first water supply amount, and the first water supply amount may be 3400 to 4000 cc.

When the washing water is supplied with more than the capacity of the sump 100 in a situation where the filters 120, 130, and 140 are clogged, the washing water sprayed from the nozzles 330 and 340 does not directly hit the filters 120, 130 and 140, but rather Because it is difficult to remove foreign substances blocking the filters 120, 130, and 140 by hitting the water surface, the amount of water supplied to unblock the filters 120, 130, 140 can fill the sump 100. Adjust to a certain amount.

In addition, the fifth rotation speed (about, 1200 to 1400 RPM) is a speed for directing the washing water sprayed from the lower nozzles 330 and 340 toward the filters 120 , 130 and 140 located in the center of the bottom surface of the washing tub 30 . As a result, the speed of the washing water sprayed from the lower nozzles 330 and 340 during the normal stroke is less than half the rotation speed (about 2600 RPM or more) at which the washing water can go to the end of the door 11 . When the filter 120, 130, 140 is clogged and the circulation pump 51 is driven at a rotation speed (about, 2600 RPM) at which the washing water can go all the way to the end of the door 11, it is sprayed from the lower nozzles 330 and 340. This is because the washing water hits the door 11 rather than directly hitting the filters 120 , 140 , making it difficult to remove foreign substances blocking the filters 120 , 130 , 140 .

13A to 13K are views illustrating an example of a filter clogging process performed by the dishwasher according to an exemplary embodiment.

In order to proceed with the filter clogging process, the control unit 720 drives the drain pump 52 through the driving unit 740 to perform a first drain operation of completely draining the foreign substances and washing water remaining in the sump 100. .

As shown in FIGS. 13A and 13B , the first draining operation removes the clogging of the micro filter 130 through the draining operation of discharging the washing water and foreign substances collected in the sump 110 to the outside of the body 10 together. You can get the effect of unlocking by car.

Referring to FIG. 13C , after the primary drainage, the control unit 720 stops the driving of the drainage pump 52 through the driving unit 740 , and drives the water supply valve 49 to control the filters 120 , 130 , and 140 . Washing water capable of releasing the clogging may be supplied into the washing tank 30 .

When supplying washing water to clear the clogging of the filters 120, 130, 140, the flow rate of the washing water supplied to the washing tub 30 is adjusted to the second water supply amount (a small amount of washing water that can fill the inside of the sump, about 700 to 900 cc). can

When the washing water supply is completed to the second water supply amount, as shown in FIG. 13D , the control unit 720 moves the vane 400 from the reference position for a predetermined period of time (about 7 seconds) from the reference position through the driving unit 740 and then stops it. .

13e and 13f, after the front movement of the vane 400, the control unit 720 drives the circulation pump 51 at a fifth rotation speed (about 1200 to 1400 RPM) for a fifth time for a fifth time to drive the lower nozzle 330 , 340 may be sprayed toward the filters 120, 130, and 140 at the top of the sump 100.

The fifth time period may be set in consideration of the time for moving the foreign material accumulated on the upper end of the filter to the foreign material collection chamber through the washing water injection, and may be set to about 30 seconds, for example.

When the fifth time elapses, the control unit 720 stops the driving of the circulation pump 51 through the driving unit 740 to stop spraying the washing water. Through this spraying operation of the washing water, some foreign substances accumulated on the top of the filters 120, 130, 140 move to the foreign material collecting chamber 111, and the blockage of the filters 120, 130, 140 can be released to some extent. The first filter cleaning operation is in progress.

Next, the control unit 720 drives the drain pump 52 through the driving unit 740 to perform a secondary drain operation of draining foreign substances and washing water remaining in the sump 100 for a predetermined time (about 30 seconds). .

Referring to FIG. 13G , the secondary drainage operation is to release the clogging of the micro filter 130 secondarily through a drainage operation of discharging the foreign substances and washing water collected in the foreign substance collection chamber 111 to the outside of the main body 10 together. effect can be obtained.

Referring to FIG. 13H , after the secondary drainage, the control unit 720 stops the driving of the drainage pump 52 through the driving unit 740 , and drives the water supply valve 49 to control the filters 120 , 130 , and 140 . Washing water capable of releasing the clogging is supplied into the washing tank 30 .

When the washing water is supplied to clear the clogging of the filters 120, 130, 140, the flow rate of the washing water supplied to the washing tank 30 is detected by the flow meter 705 and the third water supply amount (a small amount of washing water that can fill the inside of the sump, Continue to feed the wash water until it reaches about 700cc). The third water supply amount may be less than the second water supply amount.

When the supply of washing water up to the third water supply is completed, the control unit 720 operates the circulation pump 51 at the sixth speed (approximately, 1000 to 1100 RPM) for the sixth time (the washing water sprayed from the nozzle is directly sprayed on the upper end of the filter) 13i and 13j, the washing water sprayed from the lower nozzles 330 and 340 by driving for a time to release the blockage of the sump 100; the filters 120 and 130 at the top of the sump 100 , 140) can be sprayed toward the side.

At this time, when the third water supply amount is less than the second water supply amount, the sixth rotation speed is implemented at a speed lower than the fifth rotation speed. On the other hand, when the third water supply amount is greater than the second water supply amount, the sixth rotation speed is implemented at a speed higher than the fifth rotation speed, so that the rotation speed of the circulation pump 51 can be varied according to the water supply amount.

When the sixth time elapses, the control unit 720 stops the driving of the circulation pump 51 through the driving unit 740 to stop spraying the washing water. A significant amount of foreign matter accumulated on the top of the fine filter 120 moves to the coarse filter 140 through the direct injection operation of the washing water, and the secondary filter washing that can release the clogging of the top of the filters 120 , 130 , 140 action proceeds.

The control unit 720 drives the drain pump 52 through the driving unit 740 to perform a third drain operation of completely draining the foreign substances and washing water remaining in the sump 100 .

Referring to FIG. 13K , the tertiary drainage operation releases the blockage of the micro filter 130 tertiarily through a drainage operation of discharging the foreign substances and washing water collected in the foreign substance collection chamber 111 to the outside of the main body 10 together. effect can be obtained.

When the third drain is finished, the filter clogging process is completed, and the control unit 720 may drive the motor 530 through the driving unit 740 to move the vane 400 to the reference position.

On the other hand, the filter clogging process performed by the dishwasher 1 is not limited to the above example, and in addition to this, the filter clogging process of various algorithms may be performed.

When the filter clogging process is completed, the control unit 720 may determine whether the pump abnormality is detected again. After the filter clogging release stroke is completed, if the change in power consumption of the circulation pump 51 is reduced to less than the reference value, the abnormality of the circulation pump 51 is resolved and it is determined that the circulation of the washing water is normally performed, and the stopped previous stroke is resumed. can

When resuming a previous stroke, it is possible to start over from the beginning without taking into account the progress made at the point of stop. For example, in the case of a washing cycle that is a cycle that was in progress at the time of detecting a pump abnormality, the washing cycle may be performed again from the beginning.

Alternatively, the administration may be continued from the stopping point in consideration of the progress at the stopping point. To this end, the progress state at the time of stopping may be stored in the memory 730 .

When the change in power consumption is still detected to be greater than or equal to the reference value despite the completion of the filter clogging process, the controller 720 determines that the water supply is insufficient and proceeds with replenishment water.

The make-up water can be made in various ways. For example, a method of draining all the washing water in the washing tank 30 and supplying water again is employed, or, as another example, a method of additionally supplying a predetermined amount of washing water is employed, or another For example, a method of additionally supplying a predetermined amount of washing water in stages may be employed.

When the replenishment water stroke is completed, the control unit 720 may determine whether or not a pump abnormality is detected again. After the replenishment water cycle is completed, when the change in power consumption of the circulation pump 51 is reduced to less than the reference value, it is determined that the washing water circulation is normally made, and the stopped previous cycle can be resumed.

However, when the change in power consumption is equal to or greater than the reference value even after the replenishment water cycle is completed, the control unit 720 may visually output an abnormality warning through the display unit 750 . Also, when a speaker is provided in the dishwasher 1, it is possible to audibly output an abnormality warning through the speaker.

On the other hand, even if the amount of change in power consumption detected after the completion of the replenishment water stroke is equal to or greater than the reference value, it is also possible to output an abnormality warning after trying the replenishment water several more times, rather than immediately outputting an abnormality warning. For example, if the change in power consumption is greater than or equal to the reference value even after a predetermined amount of washing water is additionally supplied, the replenishment water may be re-attempted by additionally supplying a predetermined amount of washing water.

The maximum number of retries may be predetermined by experiments or simulations, and if the change in power consumption is reduced to less than the reference value before the maximum number of retries is reached, it goes without saying that replenishment water is not additionally performed.

As described above, when the washing water circulation is not normally performed, it is possible to actively cope with the washing water circulation abnormality by sequentially and selectively performing the bubble removal cycle, the filter clogging release cycle, and the make-up water cycle.

Meanwhile, in the above-described example, it has been described that the bubble removal process, the filter clogging release process, and the replenishment water process are performed in the order, but the embodiment of the dishwasher 1 is not necessarily limited to the above order. For example, it is possible to perform the filter clogging release stroke first, and it is also possible to perform the make-up water stroke first.

Hereinafter, an embodiment related to a control method of a dishwasher will be described. The dish washing machine 1 according to the above-described embodiment may be applied to the control method of the dish washing machine. Accordingly, the above description of the dishwasher 1 may also be applied to a control method of the dishwasher.

14 is a flowchart illustrating an example of a foam removal process in a control method of a dishwasher according to an embodiment.

The amount of change in power consumption may be checked by monitoring the power consumption of the circulation pump 51 while the washing machine 1 is operating, such as preliminary washing, main washing, or rinsing. When the change in power consumption is greater than the preset reference value, it is considered that the pump abnormality has been detected (Yes of 800), and the operation being performed at the time of detecting the pump abnormality is stopped.

The control unit 720 may determine the cause of the pump abnormality as a bubble on the bottom of the washing tub 30 and perform a bubble removal operation. As an example of the bubble removal stroke, the circulation pump 51 may be driven at a first speed ( 801 ). This is to remove the bubbles by spraying the washing water directly on the foam at the bottom of the washing tank 30. When the washing water is sprayed through the intermediate nozzle 313, the sprayed washing water falls toward the bottom plate 35 and hits the bubbles. And, the foam can be removed by the blow of the washing water.

In addition, the controller 720 may control the rotation speed of the circulation pump 51 to the first speed to adjust the flow rate supplied to the nozzle. As an example, the rotation speed of the circulation pump 51 is controlled to a level (about 1400 rpm to 1600 rpm) lower than the speed applied during the washing or rinsing cycle, and the injection from the intermediate nozzle 313 toward the upper part of the washing tub 30 is By allowing the washing water to fall before reaching the lower end of the upper basket 12a, it is possible to prevent a phenomenon in which bubbles are rather increased by spraying the washing water. Also, the first speed may be a rotation speed that enables the intermediate nozzle 313 to rotate by spraying the washing water.

On the other hand, the control unit 720 may perform the bubble removal process for the first time. That is, the rotation speed of the circulation pump 51 may be controlled at the first speed for the first time period. Therefore, the control unit 720 counts the driving time of the circulation pump 51 using the timer 770, and if the first time does not elapse (No in 802), the circulation pump 51 continues at the first speed. It is driven, and when the first time elapses (YES in 802), the bubble removal cycle can be ended.

15 is a flowchart illustrating another example of a foam removal process in a method for controlling a dishwasher according to an exemplary embodiment.

The process of detecting a pump abnormality based on the change in power consumption of the circulation pump 51 ( 800 ) and driving the circulation pump 51 at the first speed for the first time ( 801 , 802 ) is the same as in the above example do.

In this example, the foam removal process is not immediately terminated after the circulation pump 51 is driven at the first speed for the first time, but the foam is washed in preparation for the possibility that the foam remains despite the direct injection of the washing water. Additional actions may be performed.

Specifically, when the first time elapses after the circulation pump 51 is driven at the first speed (YES in 802), a slow start of the circulation pump 51 is performed (803). For example, if the circulation pump 51 is driven slowly at a speed of the second speed (about 1600 rpm to 3000 rpm), it is possible to prevent the bubbles remaining on the floor that are not removed by the blow of the washing water from rapidly rising.

A slow start of the circulation pump 51 may be performed for the second time period, and the second time period may be set to about 1 minute.

When the second time elapses after the slow start of the circulation pump 51 (Yes in 804), the controller 720 may drive the circulation pump 51 at the third speed (805). . In this case, the controller 720 may control the distribution device 200 to spray the washing water through the upper nozzle 311 and the middle nozzle 313 . The third speed may be set in consideration of the water pressure required to wash the foam remaining on the bottom of the washing tub 30, for example, it may be set in the range of about 3000 rpm to 3400 rpm.

When the third time elapses (YES in 806), the defoaming stroke can be ended. The third time period may be set to an appropriate time required to wash the foam on the bottom of the washing tank 30, and may be set to about 1 minute.

In addition, after the third time has elapsed, rather than immediately ending the bubble removal process, the washing water is controlled to be sprayed through the lower nozzles 330 and 340 to wash the bubbles remaining on the bottom of the washing tub 30 once more. It is possible.

In addition, as another example, it is also possible to wait until the foam sinks to the bottom of the washing tank 30 without driving the circulation pump 51 at the start of the foam removal cycle. In this case, the operation of slow-starting the circulation pump 51 by driving the circulation pump 51 at the second speed for the second time is the same as in the above-described example.

16 is a flowchart illustrating another example of a method for resolving an abnormality in a circulation pump in a method for controlling a dishwasher according to an exemplary embodiment.

When the change in power consumption is greater than or equal to a preset reference value, it is considered that a pump abnormality has been detected (Yes in 810), and the operation being performed is stopped.

The control unit 720 may determine the cause of the pump abnormality as a bubble on the bottom of the washing tub 30 and perform a bubble removal operation. As an example of the bubble removal stroke, the circulation pump 51 may be driven at a first speed (811).

When the first time elapses (Yes in 812), it is determined whether or not a pump abnormality is detected by checking the change amount of power consumption again (813). When the amount of change in power consumption is reduced to less than the reference value, it is determined that the pump abnormality is not detected (No in 813) and the process for resolving the pump abnormality is terminated. And, it is also possible to restart the previous administration from the beginning as it restarts the previous administration that was interrupted, and if information about the administrative progress at the time of interruption is stored, it is also possible to continue the process without repeating the process before the interruption time. It is possible.

If the amount of change in power consumption is still greater than or equal to the reference value, it is reported that the pump abnormality is detected (Yes in 813), and it can be determined that the cause of the washing water circulation abnormality includes filter clogging. Accordingly, a filter clogging operation is performed (814).

17A and 17B are flowcharts illustrating an example of a filter clogging process in a control method of a dishwasher according to an exemplary embodiment.

17A and 17B , the control unit 720 drives the drain pump 52 through the driving unit 740 to perform a primary drain operation of completely draining foreign substances and washing water remaining in the sump 100. (814a).

The primary drain operation can obtain an effect of first releasing the blockage of the micro filter 130 through a drain operation of discharging the foreign substances and washing water collected in the foreign material collection chamber 111 to the outside of the main body 10 together.

After the primary drainage, the control unit 720 stops the driving of the drainage pump 52 through the driving unit 740 and drives the water supply valve 49 to release the blockage of the filters 120 , 130 , 140 . Washing water may be supplied into the washing tank 30 (814b).

When supplying washing water to clear the clogging of the filters 120, 130, 140, the flow rate of the washing water supplied to the washing tub 30 is adjusted to the second water supply amount (a small amount of washing water that can fill the inside of the sump, about 700 to 900 cc). can

When the washing water supply is completed to the second water supply amount (Yes in 814c), the control unit 720 moves the vane 400 from the reference position for a predetermined period of time (about 7 seconds) from the reference position through the driving unit 740 and then stops it (814d) ).

After the vane 400 moves forward, the control unit 720 drives the circulation pump 51 at a fifth speed (about 1200 to 1400 RPM) (814e) so that the washing water sprayed from the lower nozzles 330 and 340 is the sump 100 ) can be sprayed toward the upper filter (120, 130, 140).

The controller 720 may count the driving time based on the timer 770 , and if the fifth time has not elapsed (No in 814f), the control unit 720 may continuously drive the circulation pump 51 at the fifth speed.

The fifth time period may be set in consideration of the time for moving the foreign material accumulated on the upper end of the filter to the foreign material collection chamber through the washing water injection, and may be set to about 30 seconds, for example.

When the fifth time elapses (Yes in 814f), the control unit 720 stops the driving of the circulation pump 51 through the driving unit 740 (814g) to stop spraying the washing water. Through this spraying operation of the washing water, some foreign substances accumulated on the top of the filters 120, 130, 140 move to the foreign material collecting chamber 111, and the blockage of the filters 120, 130, 140 can be released to some extent. The first filter cleaning operation is in progress.

Next, the control unit 720 drives the drain pump 52 through the driving unit 740 to perform a secondary drain operation of draining foreign substances and washing water remaining in the sump 100 for a predetermined time (about 30 seconds). (814h).

The secondary drainage operation discharges the foreign substances and the washing water collected in the foreign substance collecting chamber 111 to the outside of the main body 10 to obtain the effect of secondarily releasing the clogging of the micro filter 130 .

After the secondary drainage, the control unit 720 stops the driving of the drainage pump 52 through the driving unit 740 and drives the water supply valve 49 to release the blockage of the filters 120 , 130 , 140 . Washing water is supplied into the washing tank 30 (814i).

The flow rate of the washing water supplied to the washing tank 30 is detected by the flow meter 705 and the washing water supply is continued until the third water supply amount (a small amount of washing water that can fill the inside of the sump, about 700cc) is reached. The third water supply amount may be less than the second water supply amount.

When the supply of washing water up to the third water supply is completed (Yes of 814j), the control unit 720 operates the circulation pump 51 at the sixth speed (about, 1000 to 1100 RPM) for a sixth time (the washing water sprayed from the nozzle is at the top of the filter) The time to release the blockage of the filter by being directly sprayed on the filter (approximately 90 seconds), the washing water sprayed from the lower nozzles 330 and 340 by driving (No of 814k and 814l) at the top of the sump 100 filter ( 120, 130, 140) side can be sprayed.

At this time, when the third water supply amount is less than the second water supply amount, the sixth speed is implemented as a speed lower than the fifth speed. On the other hand, when the third water supply amount is greater than the second water supply amount, the sixth speed may be implemented at a speed higher than the fifth speed, so that the rotation speed of the circulation pump 51 may be varied according to the water supply amount.

When the sixth time elapses (Yes in 814l), the control unit 720 stops the driving of the circulation pump 51 through the driving unit 740 to stop spraying the washing water (814m). A significant amount of foreign matter accumulated on the top of the fine filter 120 moves to the coarse filter 140 through the direct injection operation of the washing water, and the secondary filter washing that can release the clogging of the top of the filters 120 , 130 , 140 action proceeds.

The control unit 720 drives the drain pump 52 through the driving unit 740 to perform a third drain operation for completely draining the foreign substances and washing water remaining in the sump 100 ( 814n ).

The tertiary drain operation can obtain the effect of releasing the blockage of the micro filter 130 tertiarily through the drain operation of discharging the foreign substances and the washing water collected in the foreign matter collection chamber 111 to the outside of the main body 10 together.

When the third drain is finished, the filter clogging release process is completed, and the control unit 720 may drive the motor 530 through the driving unit 740 to move the vane 400 to the reference position ( 814o ).

18 is a flowchart of another example of a method for resolving a pump abnormality in a method for controlling a dishwasher according to an embodiment.

If a pump abnormality is detected (YES in 820), a bubble removal stroke is performed (821). At this time, the administration that was originally being performed may be stopped. The foam removal stroke may be performed according to the example of FIG. 14 or FIG. 15 described above, and in the example of FIG. 15 , by stopping the circulation pump 51 instead of driving it at the first speed, washing water is directly sprayed on the foam to remove it Rather, it is also possible to wash the foam with washing water after sinking it to the bottom of the washing tank 30 .

If a pump abnormality is still detected even after the bubble removal stroke is performed (Yes in 822), the controller 720 determines that the cause of the washing water circulation abnormality includes filter clogging, and performs a filter clogging release process (832). The filter clogging process may be performed according to the algorithm of FIGS. 17A and 17B described above, or may be performed according to other algorithms.

If the pump abnormality is still detected after the filter clogging release stroke is performed (Yes in 824), the control unit 720 determines that insufficient water supply is included in the cause of the pump abnormality, and performs the make-up water stroke (825).

The make-up water can be made in various ways. For example, a method of draining all the washing water in the washing tank 30 and supplying water again is employed, or, as another example, a method of additionally supplying a predetermined amount of washing water is employed, or another For example, a method of additionally supplying a predetermined amount of washing water in stages may be employed.

If the change in power consumption of the circulation pump 51 decreases below the reference value after the bubble removal stroke and after the filter clogging is performed and no pump abnormality is detected (No in 822, No in 824), the stroke stopped at the time of detecting the pump abnormality can be resumed. In this case, it is possible to start over from the beginning without considering the progress at the time of stopping, or the administration may continue from the point of stopping in consideration of the progress at the time of stopping.

As in the example of FIG. 18 , when the washing water circulation abnormality is still detected even after the filter clogging process has been performed, the make-up water cycle is additionally performed, so that it is possible to cope with various situations that may cause the washing water circulation abnormality.

On the other hand, if an abnormality in washing water circulation is detected even after replenishment water is performed, an error warning can be output.

19 is a flowchart illustrating an example of outputting an error warning in a method of controlling a dishwasher according to an embodiment.

Referring to FIG. 19 , pump abnormality detection 820 , bubble removal stroke performing 821 , pump abnormality detection 822 , filter clogging release stroke performing 823 , pump abnormality detection 824 and make-up water stroke The operations up to the execution 825 are the same as in the example of FIG. 18 described above.

As described above, if no pump abnormality is detected (No in 822, No in 824) because the change in power consumption of the circulation pump 51 decreases below the reference value after the bubble removal stroke and after the filter clogging is performed, the stopped stroke can be resumed.

In addition, it can be determined whether a pump abnormality is detected even after performing the make-up water stroke, and when the pump abnormality is detected (Yes in 826), make-up water can be additionally performed. The make-up water can be performed up to n times (n is an integer greater than or equal to 1). When a pump abnormality is detected, the make-up water stroke 825 is repeatedly performed (No in 827) until the make-up water is performed n times. can be done

Even if the replenishment water is performed n times (Yes in 827), if an error in the pump is detected, an error occurrence warning is output (828). The abnormal occurrence warning may be output visually or audibly.

Meanwhile, in the above-described example, for convenience of explanation, it has been described that the bubble removal operation, the filter clogging removal operation, and the replenishment water operation are performed in order, but the control method of the dishwasher is not limited thereto. For example, it is also possible that the filter clogging stroke or make-up water stroke is performed first.

According to the washing machine and its control method according to the above-described embodiment, when the washing water circulation is not smoothly performed, it is possible to actively respond by sequentially and selectively performing the bubble removal stroke, the filter clogging removal stroke, and the replenishment water stroke.

In addition, it is possible to obtain the effect of detecting the bubble generation, filter clogging, and insufficient water supply only by the change in power consumption of the circulation pump without a separate device for detecting bubble generation, filter clogging, and insufficient water supply.

In addition, it is possible to shorten the time required to remove the foam by spraying washing water directly on the surface of the foam, rather than simply stopping and waiting for the circulation pump to remove the foam.

1: Dishwasher
100: sump
51: circulation pump
52: drain pump
49: water supply valve
120, 130, 140: filter
710: input unit
720: control unit
730: memory
740: driving unit
750: display unit
760: detection unit
770: timer
200: distribution device

Claims (29)

washing tank;
a sump installed under the washing tank and storing washing water;
a circulation pump for pumping and circulating the washing water stored in the sump;
at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank;
a filter for filtering foreign substances contained in the washing water;
a detection unit for detecting an abnormality of the circulation pump; and
When an abnormality of the circulation pump is detected, one of a bubble removal cycle for removing bubbles generated inside the washing tank, a filter clogging releasing cycle for releasing clogging of the filter, and a make-up water cycle for additionally supplying water to the washing tank 1 It is performed as a secondary stroke, and if an abnormality of the circulation pump is detected even after the primary stroke is completed, one of the remaining two strokes is performed as a secondary stroke, and when an abnormality of the circulation pump is detected even after the secondary stroke is completed, the Dishwasher comprising; a control unit that performs one of the tertiary strokes. The method of claim 1,
The detection unit,
When the change in power consumption of the circulation pump is detected to be greater than or equal to a preset reference value, it is determined that an abnormality has occurred in the circulation pump. The method of claim 1,
The control unit is
In order to perform the foam removal process, the washing water is sprayed onto the foam through the nozzle by controlling the rotation speed of the circulation pump to a first speed. 4. The method of claim 3,
The first speed is
The dishwasher is less than the speed at which the washing water sprayed from the nozzle reaches the upper basket disposed above the nozzle, and is at least the minimum speed required to rotate the nozzle. 5. The method of claim 4,
The nozzle is
It is an intermediate nozzle located between the upper basket and the lower basket disposed below the washing tank,
The middle nozzle is
A dishwasher for spraying washing water into the foam located at the bottom of the washing tank. ◈Claim 6 was abandoned when paying the registration fee.◈ 4. The method of claim 3,
The first speed is
A dishwasher selected from the range of 1400 rpm to 1600 rpm. ◈Claim 7 was abandoned at the time of payment of the registration fee.◈ The method of claim 1,
The control unit is
A dishwasher stopping rotation of the circulation pump in order to perform the foam removal stroke. ◈Claim 8 was abandoned when paying the registration fee.◈ 8. The method of claim 7,
the at least one nozzle,
an intermediate nozzle positioned between the upper basket disposed at the upper portion of the washing tank and the lower basket disposed at the lower portion of the washing tank; and
and a lower nozzle positioned below the lower basket. ◈Claim 9 was abandoned at the time of payment of the registration fee.◈ 9. The method of claim 8,
The control unit is
A dishwasher for slow-starting the circulation pump when a preset time elapses after stopping the rotation of the circulation pump. ◈Claim 10 was abandoned when paying the registration fee.◈ 10. The method of claim 9,
The control unit is
After the circulation pump is slowly started, the dishwasher controls the washing water to be sequentially sprayed through the middle nozzle and the lower nozzle. ◈Claim 11 was abandoned when paying the registration fee.◈ The method of claim 1,
The dishwasher further comprising a water supply valve for controlling the washing water supplied to the inside of the washing tank. ◈Claim 12 was abandoned when paying the registration fee.◈ 12. The method of claim 11,
The control unit is
In order to perform the replenishment water stroke, a predetermined amount of washing water is added to the washing tank by controlling the water supply valve. ◈Claim 13 was abandoned when paying the registration fee.◈ 12. The method of claim 11,
The control unit is
In order to perform the replenishment water cycle, after draining all the washing water filled in the washing tub, the dishwasher controls the water supply valve to supply a predetermined amount of washing water to the washing tub. ◈Claim 14 was abandoned at the time of payment of the registration fee.◈ 3. The method of claim 2,
The control unit is
The dishwasher is configured to perform the bubble removal stroke as the first stroke, the filter clogging release stroke as the second stroke, and the replenishment water stroke as the third stroke. ◈Claim 15 was abandoned when paying the registration fee.◈ 15. The method of claim 14,
The control unit is
If an abnormality is detected in the circulation pump even after the make-up water cycle is completed, the dishwasher re-performs the make-up water cycle. ◈Claim 16 has been abandoned at the time of payment of the registration fee.◈ 16. The method of claim 15,
The control unit is
A dishwasher for outputting an error occurrence warning visually or audible when re-performing of the replenishment water according to the abnormal detection of the circulation pump is performed a preset number of times. washing tank;
a sump installed under the washing tank and storing washing water;
a circulation pump for pumping and circulating the washing water stored in the sump;
at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank;
a detection unit for detecting an abnormality of the circulation pump; and
When an abnormality of the circulation pump is detected, the rotation speed of the circulation pump is controlled at a first speed to spray the washing water into the bubbles generated inside the washing tub, and the first speed is the washing water sprayed from the nozzle. A dishwasher that is less than the speed at which it reaches the upper basket disposed above the nozzle and is higher than or equal to the minimum speed required to rotate the nozzle. 18. The method of claim 17,
The nozzle is
It is an intermediate nozzle located between the upper basket and the lower basket disposed below the washing tank,
The middle nozzle is
A dishwasher for spraying washing water into the foam located at the bottom of the washing tank. ◈Claim 19 was abandoned at the time of payment of the registration fee.◈ 18. The method of claim 17,
The first speed is
A dishwasher selected from the range of 1400 rpm to 1600 rpm. A washing tank, a sump installed under the washing tank and storing washing water, a circulation pump pumping and circulating the washing water stored in the sump, at least one nozzle for spraying the washing water pumped by the circulation pump into the washing tank, and In the control method of a dish washing machine comprising a filter for filtering foreign substances contained in the washing water,
monitoring whether an abnormality occurs based on a change amount of power consumption of the circulation pump;
When an abnormality of the circulation pump is detected, one of a bubble removal cycle for removing bubbles generated inside the washing tank, a filter clogging releasing cycle for releasing clogging of the filter, and a make-up water cycle for additionally supplying water to the washing tank 1 Carry out as a secondary stroke;
If an abnormality of the circulation pump is detected even after the first stroke is completed, one of the remaining two strokes is performed as a second stroke;
and performing the other one as a third stroke when an abnormality of the circulation pump is detected even after the second stroke is completed. 21. The method of claim 20,
Monitoring whether an abnormality occurs based on the change in power consumption of the circulation pump is,
and determining that an abnormality has occurred in the circulation pump when the change in power consumption of the circulation pump is detected to be greater than or equal to a preset reference value. 21. The method of claim 20,
The bubble removal process is
and controlling the rotation speed of the circulation pump to a first speed to spray the washing water into the foam. ◈Claim 23 was abandoned when paying the registration fee.◈ 23. The method of claim 22,
The first speed is
A control method of a dishwasher, which is less than a speed at which the washing water sprayed from the nozzle reaches an upper basket disposed above the nozzle and equal to or greater than a minimum speed required to rotate the nozzle. ◈Claim 24 was abandoned when paying the registration fee.◈ 21. The method of claim 20,
The bubble removal process is
stopping the rotation of the circulation pump;
when a preset time elapses after stopping the rotation of the circulation pump, slow start the pump;
and sequentially spraying washing water through an intermediate nozzle disposed in the middle of the washing tub and a lower nozzle disposed under the washing tub after the circulation pump is slowly started. ◈Claim 25 was abandoned when paying the registration fee.◈ 21. The method of claim 20,
The replenishment water administration is
A method of controlling a dishwasher, comprising adding a predetermined amount of washing water to the washing tank by controlling a water supply valve. ◈Claim 26 was abandoned when paying the registration fee.◈ 21. The method of claim 20,
The replenishment water administration is
and supplying a predetermined amount of washing water to the washing tub by controlling a water supply valve after draining all the washing water filled in the washing tub. ◈Claim 27 was abandoned when paying the registration fee.◈ 21. The method of claim 20,
performing the defoaming stroke as the first stroke;
performing the filter clogging release stroke as the second stroke;
A control method of a dishwasher for performing the make-up water stroke as the third stroke. ◈Claim 28 was abandoned when paying the registration fee.◈ 28. The method of claim 27,
and re-performing the replenishment water cycle when an abnormality is detected in the circulation pump even after the replenishment water cycle is completed. ◈Claim 29 was abandoned when paying the registration fee.◈ 29. The method of claim 28,
and outputting an error occurrence warning visually or audibly when re-performing of the replenishment water according to the abnormality detection of the circulation pump is performed a preset number of times.

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